Question

can someone tell me how this answer was worked outtUse Law of Cosines to find the missing side c:

Answer 1

missing side b?

Answer 2

yes i believe so

Answer 3

what is the law of cosines??C^2=a^2+b^2-2abcos(opp.angle)

Answer 4

????

Answer 5

i dont understand wat ur asking

Answer 6

I mean its just a matter of plugging in numbers to the cosine law

Answer 7

Answer will be 24.54

Answer 8

alrighty but how would i tryp it in my calculator

Answer 9

???

Answer 10

can u show me how u got it

Answer 11

ok

Answer 12

ok

Answer 13

in our ques the opposite angle to the unknown side is 89 degree

Answer 14

cosine law says X^2=a^2+b^2-2abcos(c)

Answer 15

plug in the numbers,c=89,a=23,b=9

Answer 16

clear now?

Answer 17

@MAYSTEPH

Answer 18

kinda

Answer 19

its nothing...just plug in those values

Answer 20

ok i guess..

Answer 21

:D